Mike, unfortunately you are not one of a very few developers in the audio world, and like it or not, you are quite high level in reality (Your 303 saw to that, no pun intended) but as users, we constantly have to put up with excuse and failures from developers, so no matter if you like it or not, people pay for things in good will, and when a developer says they will do something, we fully expect as customers to see the developer do that thing, when they do not, it is of no concern of ours if they are upset when it is pointed out in a forum, being more transparent is of way way less importance than actually delivering.
If you need n example, go and look at Native Instruments Maschine forum, they didn't communicate for years, then all of sudden because the forum and public perception imploded, they want to keep everybody updated on progress, even admitting that they ignored Maschine for years, everybody forgives them because they are being open and transparent, WRONG, that lasted all of five minutes until they delivered new hardware and the new software features that had been promised only worked with said hardware, forum now implodes again and public perception is also destroyed again, moral, deliver, that is the important part.
And don't get me wrong here, deliver Redominator 2, paid upgrade, just make it sound better and add in the sysex bank loading and stuff like you suggested, paid upgrades are no problem, we are not all spoilt little brats.
Redominator 1 was the Hoover edition, 2 will be the emulation.
If your plugin is a C++ creation, please don't say so.
If it is, pop round Marcos, he has just bought you a Mac to port it.